Pencil-sharpener.



C. C. SPENGLER.

PENCIL SHARPENER.

APPLICATION FILED APR. 29. 191s.

1 ,283,584. v Pafented Nov. 5,.1918

I UNITED s'rATEs PA'rEzu'i onnrcn. y

CHARLES c. SPENGLER, or nocKFonD, ILLINOIS, AssIGNoR To AUTOMATIC PENCIL SHARPENER COMPANY,- 0F CHICAGO, ILLINOIS, A CORPORATION OIE' NEWYORK. v

PENCIL'-sfEIAItIEIrEIt.4

Application meaAprn 29, 191s. serial-No. 231,338.

To all whom z't may concern:

Be it known that I, CHARLES C. SPENGLER, acitizen ofthe United States, residing at Rockford, in the county of Winnebago and State of Illinois, have invented certain new and useful Improvements in Pencil-Sharp# eners,` of which the following is a specification.l

My invention relates to pencil Sharpeners of the type having a revolving cutter mounted on a standard and surrounded by a receptacle to catch the shavings from the cutting operation. The invention relates particularly `to means. for mounting the receptacle upon the standard, and has for its object to provide a simple, inexpensive,'eiicient and 1 lasting construction, through means of'which thev receptacle may be, conveniently applied to and removed from the standard, and will be firmly seated without vibration while in place. .f

The underlying features 'of the invention are an approximately cylindrical seat, preferably concentric with the axis of revolution of the cutter, carried by the standard in position lto receive the receptacle surrounding the cutter, and an opening in the wall of the receptacle to receive said seat; the seat being slightly tapered to insure a firm bearing of the receptacle thereon, and being -provlded with a circumferential groove or grooves in a plane or planes slightly in- A clined to a plane perpendicular to the axis of revolution, and adapted to receive a lug carried by the receptacle so that when the receptacle is placed over the `seat and given a partial revolution relatively to the seat, the inelined groove will develop a camming action and lock the parts tightly together.

The -invention will be more fully understood by reference to the accompanying drawings, in which'- Figure 1 is a perspective View of the standard with the head and cutter mounted therein; v

Fig. 2 is a similar view, partly in section,

of the receptacle to be mounted on the head of the standard; and

Fig. 3, is a detailed view showing by an axial section the coperation of the inclined cam-ming groove of the head with the engaging lug of the receptacle.

1 represents the standard, which is provided with a head 2 and an elon ated bearing 8, which receives the shaft o the cutter faces 9 and 10 causes the parts to come to a' firm seating one upon the other so as to hold the receptacle snugly in place without vibration. The face 9 carries a lug 11, conveniently provided by deflecting a portion of the flange 9a which extends into a groove 12in the face 10 of the head 2, and said groovey is in a plane 4slightly inclined to a plane perpendicular to the axis of revolution, so that when the lug 11 is placed in the outer end of the groove, and the receptacle is rotated relatively to the head, a camming effect is 'developed which forces the receptacle to a firm seating upon the head. Groove 12 is preferably duplicated, as suggested at 12a, at a position approximately 90o from the position of the groove 12, so that the receptacle may be secured to the head in a substantially vertical' position, even though the base of the standard 1 be attached to a vertical surface.

Specification of Letters Patent. Patented NOV. 5, 1918.

The end wall 8a is preferably stamped from white gage metal which develops some resiliency in its flange 9a, and this assists in conforming and firmly seating the parts one upon another in a manner to resist vibration. lThis resiliency also assists in rmly binding the lug 11 against `the wall of the groove 12, and, preventing the parts from shaking loose while in use.

Wha-t I claim is:

1. In a pencil sharpener, the combination of a standard having a substantially cylindrical receptacle seat, and a receptacle having an end wall formed with an opening to receive, and a resilient flange around said opening conforming to and fitting said seat and revolubly supporting the receptacle thereon, a locking connection being provided between said flange and said seat drawing the receptacle firmly upon the standard by their relative rotation.

2. In a pencil Sharpener, the combination of a standard having a substantially cylindrical `receptacle seat, and a receptacle havingaan` end Wall formed With an opening to receive and a resilient flange around said opening confomning to and fitting said seat and revolubly supporting the receptacle thereon, a locking connection being provided between said flange and said seat drawing the receptacle firmly upon the standard by their relative rotation, said locking connection comprising van inclined groove in the cylindrical seat and a deflected portion on the iiange in position to enter said groove.

3. In a pencilsharpener, the` combination VoiE a standard having a cylindrlcal seat, and

said seat and formed with an inturned resilient iange fitting said seat and supporting the receptacle revolubly thereon, said 4 cylindrical seat having an inclined groove therein and said flange having its inner edge deflected to provide a lug which enters Said groove and which develops axial thrust upon the flange by rotation of the receptacle upon the seat.

Signed at Chicago, in the county of Cook, State of illinois, this 24th day of April, A.

CHARLES C. SPENGLER.. 

